Dear Sunny,
Hope you are doing well !!
1 & 2. Yes, you can use capital gain amount to construct the residential property on the land owned by your father but you will not be eligible to claim the same for capital gain exemption.
Against sale of residential house, you need to invest long term capital gain in the below options to get capital gain exemption:
-You can claim an exemption from LTCG, under section 54 of the income-tax Act if the LTCG is reinvested in a new residential property located in India within the specified time frames. Where the new property is purchased, the gain is required to be reinvested either within 1 year prior to sale date or 2 years after the sale date. Where the new property is constructed, the time period prescribed for the reinvestment is within 3 years from the date of sale of the original asset.
However, the law does not clearly say that the new property must be bought only in the name of the seller and not on anybody else’s name. Hence, there are interpretations that Joint ownership can be acceptable but exemption can be limited to the share of ownership.
-Alternatively and/or additionally, you can invest the capital gains of up to Rs 50 lakhs in bonds of NHAI or REC, within six months of its accrual and get the exemption u/s 54EC.
Such bonds shall be redeemable after 5 years. Only interest received on such bonds shall be taxable. There would be no taxes on redemption after 5 years.
It is advisable to take a phone consultation for detailed discussion.